I'm new to the forum but not to Nodal Ninja having previously owned an SPH-1 and now a NN3 but mostly using the NN5L.
I use my Nikon D300 WiTH MB-D10 attached. I have a Really Right Stuff BMBD10 QR plate permanently attached to the D300/MB-D10. I also have the NN Arca Style QR adapter permanently mounted to the NN5 Camera mounting plate. This allows me to quickly attach and remove the camera plus easily adjust the upper rail setting to suit my various lenses. In order to use this setup requires a bit more travel along the lower rail than is available without modification. To do this you need to 'mod' the lower rail of the NN5 buy filing down just the 'ridge' at the end of the lower rail. Doing this will allow you an additional 6mm (approximately) of travel along the lower rail. Basically the vertical arm is allowed to move as far along the lower rail as it's mounting bolt will allow. This setting (~LR_122) works perfectly with the D300/MD-D10/RRS BMBD10/NNQR/NNCP combo.